Light leakage detection equipment

Abstract

The utility model provides light leakage detection equipment, which comprises a backlight assembly, a liquid crystal display screen to be detected is mounted on the backlight assembly; the pressure assembly comprises a pressure rod, and when the pressure rod is in contact with a non-pixel area of the liquid crystal display screen to be detected, the pressure rod applies pressure to the liquid crystal display screen to be detected; and the detection assembly is used for detecting the light leakage area of the liquid crystal display screen to be detected. The light leakage detection equipment is easy to operate, does not need manual identification, can reliably detect the light leakage area of the liquid crystal display screen, and improves the detection efficiency and the detection accuracy.

Description

Technical Field

[0001] The utility model generally relates to the technical field of light leakage detection, and in particular to a light leakage detection device. Background Art

[0002] There may be light leakage problems in the ADS display mode. When the whole screen is in L0 state, there are dot or sheet light leakage on the edges. The existing light leakage test detection method needs to be completed in the module section. The specific operation method is that the LCD screen and the backlight are combined into a module, and the operator mainly judges the degree of light leakage in the dark room. However, this detection method has the following shortcomings: it requires multiple disassembly and assembly of the module, and it is based on the subjective judgment of the operator's human eyes, which is highly dependent on personnel. Different backlight brightness, different operators, different times, different dark rooms, etc. will affect the detection results, resulting in low detection efficiency and difficulty in determining the accuracy of the detection results. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a light leakage detection device, which is conducive to exposing light leakage points by applying pressure to the liquid crystal display screen, and the detection component can reliably detect the light leakage area, has a simple structure, is easy to operate, and improves the detection efficiency and accuracy.

[0004] In a first aspect, the utility model provides a light leakage detection device, comprising:

[0005] A backlight assembly, on which the liquid crystal display screen to be inspected is mounted;

[0006] A pressure assembly, including a pressure rod, which applies pressure to the liquid crystal display screen to be tested when the pressure rod is in contact with a non-pixel area of ​​the liquid crystal display screen to be tested;

[0007] The detection component is used to detect the light leakage area of ​​the liquid crystal display screen to be detected.

[0008] As an optional solution, a limiting member is also included. The limiting member is installed on the backlight assembly and is located on the side of the liquid crystal display screen to be detected. The limiting member and the liquid crystal display screen to be detected limit each other.

[0009] As an optional solution, the pressure component further includes a mechanical sensor, the sensing end of which is connected to the pressure rod and is used to detect the pressure of the pressure rod on the liquid crystal display screen to be detected.

[0010] As an optional solution, the pressure component also includes a driving rod, which is connected to the mechanical sensor to drive the dynamic sensor to move, so as to adjust the contact position and pressure between the pressure rod and the liquid crystal display screen to be detected.

[0011] As an optional solution, the driving rod is also used to move the dynamic sensor and the pressure rod away from the LCD screen to be detected.

[0012] As an optional solution, the detection component includes a detection member and a detection driver, which is connected to the detection member. The detection driver is used to drive the detection member to move closer to or away from the LCD screen to be detected, so that the detection member can detect the light leakage area of ​​the LCD screen to be detected.

[0013] As an optional solution, the detection driving member includes a lifting part and a transverse moving part, the lifting part is used to drive the detection member to move along the first direction, and the transverse moving part is used to drive the detection member to move along the second direction;

[0014] The lifting part is arranged on the output shaft of the transverse moving part, and the detection member is correspondingly arranged on the lifting part, and the transverse moving part drives the lifting part to move along the second direction;

[0015] Alternatively, the transverse moving part is arranged on the output shaft of the lifting part, and the detecting member is correspondingly arranged on the transverse moving part, and the lifting part drives the transverse moving part to move along the first direction.

[0016] As an optional solution, the backlight assembly includes a light box and a light-transmitting member arranged on the light box, an LED light bar is arranged inside the light box, the brightness of the LED light bar is adjustable, and the LCD screen to be tested is installed on the light-transmitting member; preferably, the light-transmitting member is tempered glass.

[0017] As an optional solution, the detection device also includes a bracket, and the backlight assembly, the pressure assembly and the detection assembly are installed on the bracket.

[0018] As an optional solution, a first light-proof member is disposed on the outside of the bracket, and the first light-proof member covers the entire outside of the bracket.

[0019] As an optional solution, the light box is movably mounted on the bracket and the light box can move between the inside of the bracket and the outside of the bracket.

[0020] As an optional solution, a slide rail is provided on the bracket, and a light box is installed on the slide rail. The light box drives the LCD screen to be tested to move along the length direction of the slide rail to realize the movement of the LCD screen between the inside and outside of the bracket.

[0021] As an optional solution, a motion sensor is also provided on the light box to detect the position of the light box.

[0022] As an optional solution, a retractable second light-proof member is further provided on the light box, and the second light-proof member covers a partial area of ​​the light-transmitting member, and is used to adjust the light-transmitting area of ​​the light-transmitting member to match the size of the liquid crystal display screen to be detected.

[0023] As an optional solution, the detection device further includes a controller, which is electrically connected to the backlight assembly, the pressure assembly and the detection assembly respectively;

[0024] The controller is used to receive the brightness information of the backlight assembly and determine the light leakage level of the liquid crystal display screen to be detected according to the brightness information;

[0025] The controller is used to receive the pressure of the pressure component;

[0026] The controller is used to receive the light leakage area information of the liquid crystal display screen to be detected sent by the detection component, and determine the position information of the liquid crystal display screen to be detected according to the light leakage area information and the size information of the liquid crystal display screen to be detected.

[0027] The light leakage detection device of the utility model sets the liquid crystal display screen to be detected on the backlight assembly, the pressure rod of the pressure assembly contacts the non-pixel area of ​​the liquid crystal display screen to be detected and applies pressure, and the detection assembly detects the light leakage area of ​​the liquid crystal display screen to be detected. The operation is simple, no manual identification is required, and the light leakage area of ​​the liquid crystal display screen can be reliably detected, thereby improving the detection efficiency and detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0029] Figure 1 It is a structural schematic diagram of a light leakage detection device of the utility model;

[0030] Figure 2 It is a structural schematic diagram of a light leakage detection device of the utility model;

[0031] Figure 3 This is a structural schematic diagram of a pressure component in a light leakage detection device of the utility model;

[0032] Figure 4 This is a schematic diagram of the distribution of pressure components on one side of a light leakage detection device of the utility model;

[0033] Figure 5 It is a structural schematic diagram of a detection component in a light leakage detection device of the utility model;

[0034] Figure 6 It is a structural schematic diagram of a backlight assembly in a light leakage detection device of the utility model;

[0035] Figure 7 It is a schematic cross-sectional structure diagram of a backlight assembly in a light leakage detection device of the utility model;

[0036] Figure 8This is a schematic diagram of the structure of a bracket in a light leakage detection device of the utility model;

[0037] Fig. 9 This is a structural schematic diagram of a light leakage detection device of the utility model (the backlight component is outside the bracket);

[0038] Fig.10 This is a structural schematic diagram of a light leakage detection device of the utility model (the backlight component is outside the bracket);

[0039] Fig.11 This is a structural schematic diagram of a light leakage detection device of the utility model (including a controller).

[0040] In the figure,

[0041] 100. Light leakage detection equipment;

[0042] 10. backlight assembly, 11. light box, 12. light-transmitting member, 13. motion sensor, 14. second light-impermeable member;

[0043] 20. LCD screen to be tested;

[0044] 30. pressure assembly, 31. pressure rod, 32. mechanical sensor, 33. driving rod;

[0045] 40. Detection assembly, 41. Detection member, 42. Detection drive member, 421. Lifting unit, 422. Transverse moving unit.

[0046] 50. Limiting parts;

[0047] 60, bracket, 61, slide rail;

[0048] 70. Controller. DETAILED DESCRIPTION

[0049] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0050] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] The embodiment of the present application provides a light leakage detection device 100, such as Figure 1-2 As shown, including:

[0052] A backlight assembly 10, a liquid crystal display screen 20 to be inspected is mounted on the backlight assembly 10;

[0053] The pressure assembly 30 includes a pressure rod 31. When the pressure rod 31 is in contact with the non-pixel area of ​​the liquid crystal display screen 20 to be inspected, the pressure rod 31 applies pressure to the liquid crystal display screen 20 to be inspected.

[0054] The detection component 40 is used to detect the light leakage area of ​​the liquid crystal display screen 20 to be detected.

[0055] It can be understood that the backlight assembly 10 is used to provide a backlight light source. The backlight assembly 10 can be any structure, such as but not limited to an LED light bar, or a self-luminous device, or an OLED backlight, etc. The embodiments of the present application are not limited to this, as long as it can ensure that a backlight light source is provided for reliably detecting the light leakage area of ​​the liquid crystal display screen.

[0056] In practical applications, the brightness of the backlight assembly 10 can be fixed or flexibly adjustable to adapt to light leakage detection conditions of different brightness. The brightness of the backlight assembly can be adjusted by the light source driving board.

[0057] The pressure component 20 is used to apply pressure to the BM (Black Matrix) area (also called non-pixel area) of the LCD screen to be tested. Since the light leakage area of ​​the LCD screen is caused by internal stress, the light leakage area can be made visible by applying pressure to the non-pixel area of ​​the LCD screen. The pressure rod 21 of the pressure component 20 directly contacts the LCD screen to apply pressure, and the position of the pressure rod 21 is adjustable, which is conducive to adapting to LCD screens of different sizes.

[0058] In some embodiments, there can be at least two pressure components 20, which are evenly spaced at two opposite sides of the LCD screen, thereby protecting and ensuring that after the pressure component applies pressure to the LCD screen, the LCD screen is balanced in force, always remains flat and fully fits with the backlight component, and avoids external light leakage from causing hard canyons in the light leakage detection of the LCD screen, thereby ensuring reliable detection of light leakage on the LCD screen; correspondingly, there can be at least two pressure rods 31.

[0059] In actual use, the pressure rod is made of steel, such as but not limited to a steel bar or a steel block, which is beneficial to ensure that the pressure rod will not be deformed due to long-term use.

[0060] It can also be understood that the detection component 40 can detect the photographing area by collecting images, such as photographing detection or shooting videos; in a preferred embodiment, the detection component 40 can use an industrial camera to take pictures of the LCD screen placed on the backlight component 40 to perform light leakage detection on the pixels of the LCD screen. In this way, instead of manually performing light leakage detection on the LCD screen, the light leakage detection efficiency of the pixel area of ​​the LCD screen can be improved, and the light leakage detection quality can also be improved, effectively avoiding missed detection.

[0061] The light leakage detection device of the embodiment of the present application solves the problem that the prior art needs to constantly disassemble and assemble the backlight assembly and the liquid crystal display screen through manual detection, which has low detection efficiency, high dependence on personnel, and low detection accuracy. The light leakage detection device of the embodiment of the present application sets the liquid crystal display screen to be detected on the backlight assembly, and the pressure rod of the pressure assembly contacts and applies pressure to the non-pixel area of ​​the liquid crystal display screen to be detected, and the detection assembly detects the light leakage area of ​​the liquid crystal display screen to be detected. The operation is simple, no manual identification is required, and the light leakage area of ​​the liquid crystal display screen can be reliably detected, thereby improving the detection efficiency and detection accuracy.

[0062] As an achievable method, Figure 2 As shown, it also includes a limiting member 50, which is installed on the backlight assembly 10 and is located on the side of the liquid crystal display screen 20 to be detected. The limiting member 50 and the liquid crystal display screen 20 to be detected limit each other.

[0063] It should be noted that the limiting member 50 is located on the side of the liquid crystal display screen 20 to be detected, and the limiting member 50 may be located on at least one side of the liquid crystal display screen 20 to be detected, for example, the limiting member 50 is located on two opposite sides of the liquid crystal display screen 20 to be detected; of course, the limiting member 50 may also be located on four sides of the liquid crystal display screen 20 to be detected;

[0064] Furthermore, there may be at least one limiting member 50. When there is only one limiting member 50, the limiting member 50 may be limited by one side surface of the liquid crystal display screen 20 to be detected. Of course, the limiting member 50 may also be a whole limiting member that encloses and defines a containing area, and is limited by the four side surfaces of the liquid crystal display screen 20 to be detected. Specifically, the limiting member 50 may be a limiting steel plate arranged on the backlight assembly 10, and the limiting steel plates enclose and define a containing area for holding the liquid crystal display screen 20 to be detected. The liquid crystal display screen 20 to be detected is placed in the containing area, and the limiting steel plates abut against the four side surfaces of the liquid crystal display screen to be detected, thereby limiting and fixing the liquid crystal display screen 20 to be detected, and preventing the liquid crystal display screen 20 to be detected from moving, resulting in invalid testing. When there are two or more limiting members 50, according to actual needs, the limiting members 50 may be distributed on at least two side surfaces of the liquid crystal display screen 20 to be detected, and the embodiments of the present application do not make specific limitations on this.

[0065] It can be understood that the limit member 50 can be any kind of limit block, clip, etc., and of course it can also be a fixing pin, etc. The embodiments of the present application do not make specific limitations on this. It can be rotated according to actual processing needs, as long as it can ensure stable and reliable limiting of the LCD screen 20 to be tested and ensure that the LCD screen 20 to be tested does not move, thereby avoiding invalid testing.

[0066] The position-limiting member of this embodiment is helpful to stabilize the position of the liquid crystal display screen to be inspected, thereby ensuring reliable inspection of the liquid crystal display screen to be inspected.

[0067] As an achievable method, Figure 3 and 4 As shown, the pressure assembly 30 further includes a mechanical sensor 32 , the sensing end of which is connected to the pressure rod 31 , and is used to detect the pressure of the pressure rod 31 on the liquid crystal display screen 20 to be detected.

[0068] It is understandable that the mechanical sensor 32 can be any existing pressure sensor, as long as it can reliably ensure the pressure of the pressure rod 31 on the liquid crystal display screen to be detected. The number of mechanical sensors 32 can be a number corresponding to the number of pressure rods 31, and the sensing end of each mechanical sensor 32 is connected to a pressure rod 31; of course, when the pressure rod 31 is arranged parallel to the side of the liquid crystal display screen 20 to be detected, the sensing ends of multiple mechanical sensors 32 can also be connected to one pressure rod 31, and the embodiments of the present application do not specifically limit this.

[0069] For example, Figure 3 As shown, the mechanical sensors 32 are evenly distributed along the side of the liquid crystal display screen to be tested. Specifically, four mechanical sensors are arranged on the long side of the liquid crystal display screen 20 to be tested, and three mechanical sensors are arranged on the short side.

[0070] In this embodiment, by setting up a mechanical sensor, it is helpful to accurately control the pressure of the pressure rod on the LCD screen to be tested, ensuring that the light leakage points of the LCD screen are reliably visible, avoiding damage to the LCD screen due to excessive pressure, or too little pressure to show the light leakage points, affecting the accuracy of the detection.

[0071] In some embodiments, the pressure assembly 30 further includes a driving rod 33 , and the driving rod 33 and the mechanical sensor 32 drive the connection belt dynamic sensor 32 to move, so as to adjust the contact position and pressure between the pressure rod 31 and the LCD screen 20 to be detected.

[0072] It is understandable that the driving rod 33 may be one, two or more than two, and the number of the driving rods 33 is consistent with that of the mechanical sensors 32. Each mechanical sensor 32 is connected to a driving rod 33, which is conducive to ensuring that the driving rod 33 reliably drives the mechanical sensor 32 to drive the pressure rod 31 to move. In actual detection, for LCD screens of different sizes to be detected, it is necessary to adjust the position of the pressure rod 31 so that the pressure rod 31 contacts the non-pixel area of ​​the LCD screen to be detected and applies pressure. In this way, the driving rod 33 can drive the pressure rod 31 to move to adjust the spacing between the pressure rods 31, or drive the pressure rod 31 to move along the side of the LCD screen 20 to be detected, or drive the pressure rod 31 to move close to the non-image area of ​​the LCD screen 20 to be detected.

[0073] The arrangement of the driving rod in this embodiment is conducive to adapting to the detection of liquid crystal screens of different sizes, adjusting the position of the pressure rod, and ensuring that the pressure rod can reliably apply pressure to the non-pixel area of ​​the liquid crystal screen to be detected, thereby improving the detection accuracy.

[0074] In some embodiments, the driving rod 33 is also used to move the dynamic sensor 32 and the pressing rod 31 away from the LCD screen 20 to be detected.

[0075] In this embodiment, it is helpful to ensure that after the LCD screen to be tested is tested, the screen to be tested can be easily disassembled or replaced, thereby avoiding collision between the screen to be tested and the pressure rod or the mechanical sensor, causing unnecessary damage to the screen or the mechanical sensor, which is beneficial to protecting the quality of the screen to be tested and extending the service life of the testing equipment.

[0076] As an achievable method, Figure 2 and 5 As shown, the detection component 40 includes a detection member 41 and a detection driving member 42. The detection driving member 42 is connected to the detection member 41. The detection driving member 42 is used to drive the detection member 41 to move closer to or away from the liquid crystal display screen 20 to be detected, so that the detection member 41 can detect the light leakage position of the liquid crystal display screen 20 to be detected.

[0077] It should be noted that the detection drive member 42 can be any driving member, such as a motor, a cylinder, etc. The detection member 41 is mounted on the output shaft of the detection drive member 42, and the detection drive member 42 drives the detection member 41 to move toward or away from the liquid crystal display screen 20 to be detected, so as to ensure that the detection member 41 can detect the liquid crystal display screen 20 to be detected.

[0078] The detection element 41 may be a detection camera and a detection aperture. The detection aperture is disposed at the bottom of the detection camera. The detection aperture is used to provide a light source so that the detection camera can perform light leakage detection on the liquid crystal display screen 20 to be detected.

[0079] In actual use, the detection element 41 may be an industrial camera, such as a CCD camera, which has a high impact resistance.

[0080] The arrangement of the detection element and the detection driving element in this embodiment is conducive to ensuring reliable detection of the light leakage area of ​​the liquid crystal display screen to be detected.

[0081] In some embodiments, Figure 5 As shown, the detection driving member 42 includes a lifting portion 421 and a transverse moving portion 422, the lifting portion 421 is used to drive the detection member 41 to move along the first direction, and the transverse moving portion 422 is used to drive the detection member 41 to move along the second direction;

[0082] The lifting part 421 is disposed on the output shaft of the transverse moving part 422, and the detection member 41 is correspondingly disposed on the lifting part 422, and the transverse moving part 422 drives the lifting part 421 to move along the second direction;

[0083] Alternatively, the transverse moving part 422 is disposed on the output shaft of the lifting part 421 , and the detecting member 41 is correspondingly disposed on the transverse moving part 422 , and the lifting part 421 drives the transverse moving part 422 to move along the first direction.

[0084] It should be noted that the first direction refers to a direction perpendicular to the surface of the liquid crystal display screen to be detected, and the second direction refers to a direction parallel to the surface of the liquid crystal display screen to be detected.

[0085] It is understandable that the lifting part 421 can be but not limited to a motor or a cylinder, etc., and the lifting part 421 drives the lateral moving part 422 and the detection member 41 in a direction perpendicular to the liquid crystal display screen 20 to be detected (such as Figure 2 The lateral moving part 422 may be, but is not limited to, a motor or a cylinder, and the lateral moving part 422 drives the lifting part 421 and the detecting part 41 to move in a direction parallel to the liquid crystal display screen 20 to be detected (such as the Y direction in the figure). Figure 2 The lateral moving portion 422 drives the detection member 41 to move in a direction parallel to the liquid crystal display screen 20 to be detected; the embodiments of the present application are not limited to this, as long as it can ensure that the detection member is driven to move to a suitable position and the light leakage area of ​​the liquid crystal display screen 20 to be detected can be reliably detected.

[0086] In this embodiment, the flexibility of the detection drive member is increased by the lifting part and the lateral movement part, and the movement of the detection member can be controlled from multiple directions, thereby reliably ensuring that the detection member detects the light leakage area of ​​the liquid crystal display screen to be detected.

[0087] As an achievable method, Figure 6 and 7As shown, the backlight assembly 10 includes a light box 11 and a light-transmitting member 12 arranged on the light box 11. An LED light bar is arranged inside the light box 11, and the brightness of the LED light bar is adjustable. The liquid crystal display screen 20 to be detected is installed on the light-transmitting member 12; preferably, the light-transmitting member 12 is tempered glass.

[0088] It is understandable that the LED light bar is arranged inside the light box 11, mainly used to provide a backlight source, and the brightness of the LED light bar is adjustable to meet the light leakage conditions of different LCD screens under different brightness conditions. The light-transmitting member 12 is mainly used for transmitting light and can be used to detect whether the LCD screen to be detected is leaking light.

[0089] It should be noted that the light-transmitting member 12 is mounted on the light box 11, and the other areas of the light box 11 except the area of ​​the light-transmitting member 12 need to be sealed and light-proof to prevent light leakage, so as to prevent external light leakage from affecting the light leakage of the LCD screen to be tested. The LCD screen 20 to be tested is mounted on the light-transmitting member 12, and it must be ensured that the surface of the light-transmitting member 12 is sufficiently flat, and the light-transmitting member 12 and the screen 20 to be tested fit tightly, so as to avoid light leakage caused by the assembly of the LCD screen 20 to be tested.

[0090] In a specific embodiment, the light box 11 may have one surface made of a light-transmitting material, the light-transmitting surface being configured as the light-transmitting member 12, and the other surfaces being opaque. Of course, the light box 11 may also have one surface open, and the light-transmitting member 12 may be installed in the open surface. In a preferred embodiment, the light-transmitting member 12 is tempered glass, which has a light-transmitting effect and a flat surface, which is conducive to ensuring reliable installation of the liquid crystal display screen to be tested.

[0091] In some embodiments, Figure 8 As shown, the light leakage detection device 100 further includes a bracket 60, and the backlight assembly 10, the pressure assembly 30 and the detection assembly 40 are mounted on the bracket.

[0092] It should be noted that the bracket of this embodiment serves as the main bracket of the entire light leakage detection device, and is mainly used to facilitate the installation of the backlight assembly 10, the pressure assembly 30 and the detection assembly 40, so that the entire light leakage detection device has a compact structure and is easy to use.

[0093] In actual use, a first light-proof member is disposed outside the bracket 60 , and the first light-proof member covers the entire outside of the bracket 60 .

[0094] The first light-proof member may be any component, such as but not limited to a black curtain, a housing or a steel plate, etc., as long as it can conveniently create a black room during testing to ensure that the imaging of the LCD screen to be tested is not disturbed by the outside world.

[0095] As an implementable manner, the light box 11 is movably mounted on the bracket 60 and the light box 11 can move between the inside of the bracket 60 and the outside of the bracket 60 .

[0096] It is understandable that before detecting the light leakage of the LCD screen 20, the light box 11 is moved out of the bracket 60, and after the LCD screen 20 to be detected is installed on the light box 11, the light box 11 is pushed into the bracket 60. After the detection is completed, the light box is moved out of the bracket 60 and the LCD screen is taken out to prevent another screen from being detected.

[0097] In this embodiment, the light box moves outside and inside the bracket, which is beneficial for installing and disassembling the LCD screen to be tested and avoids collision with the mechanical sensor or pressure rod inside the bracket when disassembling the LCD screen.

[0098] In a preferred embodiment, Figure 8 , 9 As shown in FIG. 10 , a slide rail 61 is provided on the bracket 60 , and the light box 11 is installed on the slide rail 61 . The light box 11 drives the LCD screen 20 to be inspected to move along the length direction of the slide rail 61 , so as to realize the movement of the LCD screen 20 between the inside and the outside of the bracket 60 .

[0099] The provision of the slide rail in this embodiment is conducive to ensuring reliable movement of the light box, and the slide rail has a guiding function, which effectively avoids the light box from colliding with other components on the bracket during movement.

[0100] As an achievable method, Fig.10 As shown, a motion sensor 13 is also disposed on the light box 11 for detecting the position of the light box 11 .

[0101] The motion sensor 13 may be any type of position sensor, which is not specifically limited in this embodiment.

[0102] In some embodiments, a retractable second light-proof member 14 is further provided on the light box 11 , and the second light-proof member 14 covers a partial area of ​​the light-transmitting member 12 , and is used to adjust the light-transmitting area of ​​the light-transmitting member 12 to match the size of the liquid crystal display screen 20 to be detected.

[0103] The second light-proof member 14 can be any component, such as but not limited to a black curtain, a housing or a steel plate, etc., as long as it can conveniently create a black room during testing to ensure that the imaging of the LCD screen to be tested is not disturbed by the outside world.

[0104] For example, a reel is installed on the light box 11, and a black curtain is wound on the reel. According to the size of the actual display screen to be inspected, the black curtain wound on the reel is released to block the light-transmitting member 12, so that the light-transmitting area of ​​the light-transmitting member 12 matches the size of the display screen 20 to be inspected.

[0105] In this embodiment, the provision of the second light-impermeable member is conducive to adjusting the size of the light-transmitting area of ​​the light-transmitting member, so that the size of the light-transmitting area can adapt to objects of various sizes to be detected.

[0106] As an achievable method, Fig.11 As shown, the light leakage detection device 100 further includes a controller 70, and the controller 70 is electrically connected to the backlight assembly 10, the pressure assembly 30 and the detection assembly 40 respectively;

[0107] The controller 70 is used to receive the brightness information of the backlight assembly 10, and determine the light leakage level of the liquid crystal display screen 20 to be detected according to the brightness information;

[0108] The controller 70 is used to receive the pressure of the pressure component 30;

[0109] The controller 70 is used to receive the light leakage area information of the LCD screen 20 to be detected sent by the detection component 40, and determine the position information of the LCD screen 20 to be detected according to the light leakage area information and the size information of the LCD screen 20 to be detected.

[0110] It can be understood that the controller 70 is electrically connected to the light box 11 of the backlight assembly 10 for receiving the brightness information of the light box 11. The controller can also control the brightness change of the LED light strip in the light box 11 according to actual needs; the controller 70 can also be connected to the motion sensor 13 to receive the position information of the light box transmitted by the motion sensor 13, so as to determine the specific position of the light box 11; the controller 70 is electrically connected to the mechanical sensor 32 to receive the pressure sent by the mechanical sensor 32, so as to accurately control the pressure applied by the pressure rod 41 to the display screen 20 to be detected, so as to ensure the reliable display of the light leakage point while avoiding damage to the liquid crystal display screen to be detected; the controller 70 is electrically connected to the detection member 41 for receiving the light leakage area detected by the detection member, and the controller 70 is also connected to the detection driver 42 for controlling the detection driver to drive the detection member 41 to move, so as to ensure that the detection member 41 can reliably detect the light leakage area of ​​the liquid crystal display screen 20 to be detected;

[0111] Based on the information sent by the backlight assembly 10, the pressure assembly 30 and the detection assembly 40, the controller 70 can determine the light leakage position of the display screen to be detected, collect the light leakage image, mark the brightness, and determine the light leakage level, etc., which is helpful to provide guidance for the process of the liquid crystal display screen.

[0112] In summary, the light leakage detection device of the embodiment of the present application sets the liquid crystal display screen to be detected on the backlight assembly, the pressure rod of the pressure assembly contacts the non-pixel area of ​​the liquid crystal display screen to be detected and applies pressure, and the detection assembly detects the light leakage area of ​​the liquid crystal display screen to be detected. The operation is simple and no manual identification is required. The light leakage area of ​​the liquid crystal display screen can be reliably detected, thereby improving the detection efficiency and detection accuracy.

[0113] Furthermore, by providing a mechanical sensor and a driving member, it is helpful to control the pressure applied by the pressure rod to the LCD screen, and the detection driving member drives the detection member to move, which is helpful to ensure reliable detection of the light leakage area of ​​the LCD screen to be detected.

[0114] The light leakage detection device of the present utility model is described below through a specific embodiment.

[0115] like Figure 1-11 As shown, the light leakage detection device includes a bracket 60 and a controller 70. The outer cover of the bracket 60 is provided with a black curtain. The bottom of the bracket 60 is provided with a slide rail 61. A light box 11 is movably provided on the slide rail 61. An LED light bar is installed inside the light box 11. An LED driving board is also installed inside the light box 11. The LED driving board is connected to the LED light bar and is used to control the brightness change of the LED light. One side of the light box 11 is open. A tempered glass is installed at the open position as a light-transmitting member 12. A steel plate (limiting member 50) is provided at the edge area of ​​the tempered glass surface. The steel plate defines an accommodating area for placing the liquid crystal display screen 20 to be detected. The liquid crystal display screen 20 to be detected is placed in the accommodating area and is limited to each other by the steel plate. A black curtain (a second light-proof member 14) is also provided on the light box. The black curtain is adjusted so that the light-transmitting area of ​​the tempered glass matches the size of the liquid crystal display screen 20 to be detected. A motion sensor 13 is also provided on the light box 11.

[0116] A driving rod 33 is also arranged near the bottom of the bracket 60. A mechanical sensor 32 is connected to the driving rod 33. Four mechanical sensors 32 are arranged in the long side direction and three mechanical sensors 32 are arranged in the short side direction along the direction parallel to the side of the display screen 20 to be detected. The sensing end of each mechanical sensor 32 is connected to the pressure rod 31. The driving rod 33 drives the mechanical sensors 32 and the pressure rod 31 to move through the motor.

[0117] The bracket 60 is also provided with a detection driving member 42 inside. The vertical driving shaft (lifting part 421) of the detection driving member 42 is arranged in a direction perpendicular to the liquid crystal display screen 20 to be detected, the horizontal driving shaft (transverse moving part 422) is installed on the lifting part 421, and the industrial camera (detection member 41) is installed on the horizontal driving shaft;

[0118] During the inspection, the light box with the LCD screen 20 to be inspected is pushed into the bracket 60 along the slide rail 61, and the driving rod 33 with the dynamic sensor 32 and the pressure rod 31 moves, so that the pressure rod contacts the non-pixel area of ​​the LCD screen 20 to be inspected and applies pressure. The inspection driving member 42 drives the industrial camera to move, photographs the light leakage area of ​​the LCD screen to be inspected, and sends it to the controller 70. The controller 70 combines the received brightness changes, light leakage area, and pressure to determine the light leakage position of the display screen to be inspected, collects the light leakage image, brightness annotation, and determines the light leakage level, etc., which is helpful to provide guidance for the process of the LCD screen.

[0119] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate positions or positional relationships are based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the panel or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0120] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A light leakage detection device, characterized in that: include: A backlight assembly, on which the liquid crystal display screen to be inspected is mounted; A pressure assembly, comprising a pressure rod, wherein when the pressure rod is in contact with a non-pixel area of ​​the liquid crystal display screen to be inspected, the pressure rod applies pressure to the liquid crystal display screen to be inspected; The detection component is used to detect the light leakage area of ​​the liquid crystal display screen to be detected.

2. The detection device according to claim 1, characterized in that: It also includes a limiting member, which is installed on the backlight assembly and located on the side of the liquid crystal display screen to be detected. The limiting member and the liquid crystal display screen to be detected are mutually limited.

3. The detection device according to claim 1, characterized in that: The pressure component further comprises a mechanical sensor, the sensing end of which is connected to the pressure rod and is used to detect the pressure of the pressure rod on the liquid crystal display screen to be detected.

4. The detection device according to claim 3, characterized in that: The pressure assembly also includes a driving rod, which is drivingly connected to the mechanical sensor to drive the mechanical sensor to move, so as to adjust the contact position and pressure between the pressure rod and the liquid crystal display screen to be detected.

5. The detection device according to claim 4, characterized in that: The driving rod is also used to drive the mechanical sensor and the pressure rod to move away from the liquid crystal display screen to be detected.

6. The detection device according to claim 1, characterized in that: The detection component includes a detection member and a detection driving member, wherein the detection driving member is connected to the detection member and is used to drive the detection member to move closer to or away from the liquid crystal display screen to be detected, so that the detection member can detect the light leakage area of ​​the liquid crystal display screen to be detected.

7. The detection device according to claim 6, characterized in that: The detection driving member includes a lifting part and a transverse moving part, wherein the lifting part is used to drive the detection member to move along the first direction, and the transverse moving part is used to drive the detection member to move along the second direction; The lifting part is arranged on the output shaft of the transverse moving part, and the detection member is correspondingly arranged on the lifting part, and the transverse moving part drives the lifting part to move along the second direction; Alternatively, the transverse moving part is arranged on the output shaft of the lifting part, and the detecting member is correspondingly arranged on the transverse moving part, and the lifting part drives the transverse moving part to move along the first direction.

8. The detection device according to any one of claims 1 to 6, characterized in that: The backlight assembly comprises a light box and a light-transmitting member arranged on the light box. An LED light bar is arranged inside the light box. The brightness of the LED light bar is adjustable. The liquid crystal display screen to be detected is mounted on the light-transmitting member.

9. The detection device according to claim 8, characterized in that: The light-transmitting member is tempered glass.

10. The detection device according to claim 8, characterized in that: The detection device also includes a bracket, and the backlight assembly, the pressure assembly and the detection assembly are installed on the bracket.

11. The detection device according to claim 10, characterized in that: A first light-proof member is disposed outside the bracket, and the first light-proof member covers the entire outside of the bracket.

12. The detection device according to claim 10, characterized in that: The light box is movably mounted on the bracket and can move between the inside of the bracket and the outside of the bracket.

13. The detection device according to claim 12, characterized in that: The bracket is provided with a slide rail, the light box is installed on the slide rail, and the light box drives the LCD screen to be detected to move along the length direction of the slide rail, so as to realize the movement of the LCD screen between the inside and the outside of the bracket.

14. The detection device according to claim 8, characterized in that: The light box is also provided with a motion sensor for detecting the position of the light box.

15. The detection device according to claim 8, characterized in that The light box is also provided with a retractable second light-proof member, which covers a partial area of ​​the light-transmitting member and is used to adjust the light-transmitting area of ​​the light-transmitting member to match the size of the liquid crystal display screen to be detected.

16. The detection device according to any one of claims 1 to 6, characterized in that: The detection device further comprises a controller, wherein the controller is electrically connected to the backlight assembly, the pressure assembly and the detection assembly respectively; The controller is used to receive the brightness information of the backlight assembly, and determine the light leakage level of the liquid crystal display screen to be detected according to the brightness information; The controller is used to receive the pressure of the pressure component; The controller is used to receive the light leakage area information of the liquid crystal display screen to be detected sent by the detection component, and determine the position information of the liquid crystal display screen to be detected according to the light leakage area information and the size information of the liquid crystal display screen to be detected.

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